[Paraview] Pvbatch: Volume rendering a thresholded unstructured grid

Tue Aug 30 13:40:46 EDT 2011

Regarding what I previously sent, I can now just check

Threshold1.PointData.GetNumberOfArrays()

for each timestep to see if a valid output is produced, if it is then I can
apply the settings and everything works fine. Thanks for your help!

Jesus

On Tue, Aug 30, 2011 at 7:25 AM, Utkarsh Ayachit <
utkarsh.ayachit at kitware.com> wrote:

> You're getting that error because more likely than not, your threshold
> range is such that no data is getting passed through. Ensure that the
> the Threshold1.ThresholdRange is set to a valid range so that  at
> least some cells are passed through.
>
> Utaksrh
>
> On Mon, Aug 29, 2011 at 8:27 PM, Jesus Pulido <jpulido at ucdavis.edu> wrote:
> > I omitted that line before because I was getting the following error.
> > Readding it gives this error:
> > Traceback (most recent call last):
> >   File "/home/user/DNS/volume.py", line 40, in <module>
> >     DataRepresentation2.ColorArrayName = 'volume_scalars'
> >   File
> >
> "/home/user/Programs/ParaView-3.11.1-git/bin/Utilities/VTKPythonWrapping/site-packages/paraview/servermanager.py",
> > line 212, in __setattr__
> >     setter(self, value)
> >   File
> >
> "/home/user/Programs/ParaView-3.11.1-git/bin/Utilities/VTKPythonWrapping/site-packages/paraview/servermanager.py",
> > line 2267, in setProperty
> >     return self.SetPropertyWithName(propName, value)
> >   File
> >
> "/home/user/Programs/ParaView-3.11.1-git/bin/Utilities/VTKPythonWrapping/site-packages/paraview/servermanager.py",
> > line 267, in SetPropertyWithName
> >     prop.SetData(arg)
> >   File
> >
> "/home/user/Programs/ParaView-3.11.1-git/bin/Utilities/VTKPythonWrapping/site-packages/paraview/servermanager.py",
> > line 695, in SetData
> >     raise ValueError("Could not locate array %s in the input." % arr)
> > ValueError: Could not locate array volume_scalars in the input.
> >
> > Jesus
> >
> > On Mon, Aug 29, 2011 at 3:53 PM, Utkarsh Ayachit
> > <utkarsh.ayachit at kitware.com> wrote:
> >>
> >> Try adding:
> >>
> >> DataRepresentation2.ColorArrayName = 'volume_scalars'
> >>
> >> Utkarsh
> >>
> >> On Wed, Aug 24, 2011 at 7:02 PM, Jesus Pulido <jpulido at ucdavis.edu>
> wrote:
> >> > I am trying to volume render an unstructured grid of points using
> >> > pvbatch
> >> > but I am getting an error:
> >> >
> >> > ERROR: In
> >> >
> >> >
> /home/user/Programs/ParaView-3.11.1-git/ParaView/VTK/VolumeRendering/vtkUnstructuredGridVolumeRayCastMapper.cxx,
> >> > line 211
> >> > vtkUnstructuredGridVolumeRayCastMapper (0x2473a40): Can't use the ray
> >> > cast
> >> > mapper without scalars!
> >> >
> >> > When trying to use Bunyk Ray casting
> >> >
> >> > and
> >> >
> >> > ERROR: In
> >> >
> >> >
> /home/user/Programs/ParaView-3.11.1-git/ParaView/VTK/VolumeRendering/vtkOpenGLProjectedTetrahedraMapper.cxx,
> >> > line 237
> >> > vtkOpenGLProjectedTetrahedraMapper (0x2ab3190): Can't use projected
> >> > tetrahedra without scalars!
> >> >
> >> > When trying to use Projected tetra.
> >> >
> >> > I am using the "latest" git version as of today. I also tried with
> >> > PV3.10.1
> >> > 64bit linux binary and I am having the same error with pvbatch.
> >> >
> >> >
> >> > Here is the script that I am using in pvbatch. I generated this script
> >> > with
> >> > the help from using python trace within paraview (where the rendering
> >> > works). I think it tries to reference the data under
> >> >
> >> > Threshold1.Scalars = ['POINTS', 'volume_scalars']
> >> >
> >> > but even if I comment this line out of my script I obtain the same
> error
> >> > as
> >> > above so somehow it's not able to reference the scalar points.
> >> > --------
> >> > try: paraview.simple
> >> > except: from paraview.simple import *
> >> > paraview.simple._DisableFirstRenderCameraReset()
> >> >
> >> > wavelet_ = XMLImageDataReader( FileName=['/home/wavelet.vti'] )
> >> >
> >> > wavelet_.CellArrayStatus = []
> >> > wavelet_.PointArrayStatus = ['volume_scalars']
> >> >
> >> > RenderView4 = GetRenderView()
> >> > RenderView4.CameraViewUp = [0.0, 0.0, 1.0]
> >> > RenderView4.CameraPosition = [-725.7466298125642, 127.5, 127.5]
> >> > RenderView4.CameraFocalPoint = [127.5, 127.5, 127.5]
> >> > RenderView4.CameraClippingRange = [590.9891635144385,
> >> > 1185.4328292597527]
> >> > RenderView4.Background = [0.0, 0.0, 0.0]
> >> > RenderView4.CenterAxesVisibility = 0
> >> > RenderView4.OrientationAxesVisibility = 0
> >> > RenderView4.ViewSize = [800, 600]
> >> >
> >> > SetActiveSource(wavelet_)
> >> > Threshold1 = Threshold()
> >> >
> >> > a1_volume_scalars_PVLookupTable = GetLookupTableForArray(
> >> > "volume_scalars",
> >> > 1, RGBPoints=[1.9, 0.0, 1.0, 0.0, 1.95, 1.4972662149337713e-07, 1.0,
> >> > 0.0014876325368879406, 2.0, 0.0, 0.996078431372549, 0.0, 2.05,
> >> > 1.6337586200641548e-07, 1.0, 0.0015525676008689975, 2.1,
> >> > 1.2838779441233928e-07, 1.0, 0.0013859544585118407] )
> >> > a1_volume_scalars_PiecewiseFunction = CreatePiecewiseFunction()
> >> > a1_volume_scalars_PiecewiseFunction.Points = [1.9, 0.1, 1.95, 0.5,
> 2.0,
> >> > 1.0,
> >> > 2.05, 0.5, 2.1, 0.1]
> >> >
> >> > Threshold1 = GetActiveSource()
> >> > Threshold1.Scalars = ['POINTS', 'volume_scalars']
> >> > Threshold1.ThresholdRange = [1.9, 2.1]
> >> >
> >> > DataRepresentation2 = Show()
> >> > DataRepresentation2 = GetDisplayProperties(Threshold1)
> >> > DataRepresentation2.EdgeColor = [0.0, 0.0, 0.5000076295109483]
> >> > DataRepresentation2.SelectMapper = 'Fixed point'
> >> > DataRepresentation2.ScalarOpacityFunction =
> >> > a1_volume_scalars_PiecewiseFunction
> >> > DataRepresentation2.ScalarOpacityUnitDistance = 7.74209043877865
> >> > DataRepresentation2.LookupTable = a1_volume_scalars_PVLookupTable
> >> > DataRepresentation2.Representation = 'Volume'
> >> > DataRepresentation2.SelectMapper = 'Bunyk ray cast'
> >> >
> >> > Render()
> >> >
> >> > -----
> >> >
> >> >
> >> > Jesus
> >> >
> >> > _______________________________________________
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> >> >
> >> >
> >
> >
> >
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> > Powered by www.kitware.com
> >
> > Visit other Kitware open-source projects at
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> >
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